The paradigm of warm quintessential inflation and spontaneous baryogenesis

TL;DR

This paper presents a warm quintessential inflation model that naturally explains baryogenesis, cosmic acceleration, and relic gravitational waves, unifying early and late universe phenomena with a single scalar field and neutrino coupling.

Contribution

It introduces a novel warm inflation framework with a specific scalar potential that accounts for baryogenesis, late-time acceleration, and neutrino interactions, unifying multiple cosmological phases.

Findings

Successful baryon asymmetry generation post-inflation.

Scalar field evolution leads to late-time cosmic acceleration.

Model reproduces cosmic history from inflation to present without initial condition dependence.

Abstract

In this paper, we consider a scenario of spontaneous baryogenesis in a framework of warm quintessential inflation where the residual inflaton field, left out after warm inflation, plays the role of quintessence field at late times and is coupled to a non-conserved baryonic current. Assuming a four fermion $(B-L)$ violating effective interaction, we have demonstrated that the required baryon asymmetry can be produced successfully in this case. We show that the post-inflationary evolution, with the underlying scalar field potential, $V(\phi)=V^4_0 \exp{(-\alpha \phi^n/M_{\rm Pl}^4 ) }$, $n>1$ well suited to warm inflation, exhibits scaling behaviour soon after a brief kinetic regime. We show that the coupling of the scalar field to massive neutrino matter can give rise to exit from the scaling regime to cosmic acceleration at late times as massive neutrinos turn non-relativistic. The proposed model is shown to successfully describe the cosmic history from inflation to late-time acceleration, with the evolution independent of initial conditions, along with the generation of baryon asymmetry during the post-inflationary era. A brief analysis of relic gravity waves produced in the scenario is presented.